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344800-40-4

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344800-40-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 344800-40-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,4,4,8,0 and 0 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 344800-40:
(8*3)+(7*4)+(6*4)+(5*8)+(4*0)+(3*0)+(2*4)+(1*0)=124
124 % 10 = 4
So 344800-40-4 is a valid CAS Registry Number.

344800-40-4Relevant academic research and scientific papers

Preparation of Chiral Diphenyl-Substituted Polyether-Diester Compounds

Bradshaw, Jerald S.,Jolley, Scott T.,Izatt, Reed M.

, p. 1229 - 1232 (1982)

A new series of chiral polyether-diester ligands has been prepared by reacting racemic and chiral diphenyl-substituted tetraethylene glycols with diglycolyl chloride (5 and 6), 2,5-furandicarbonyl chloride (7 and 8), 2,6-pyridinedicarbonyl chloride (9-12), and 4-methoxy-2,6-pyridinedicarbonyl chloride (13).The chiral diphenyl-substituted tetraethylene glycols were prepared from the dl-, (S)-, and (R)-mandelic acids.

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